[1/2] Move existing OTLP metrics temporality tests and helpers

[vpellan]

Motivation

Split the temporality work for APMAPI-2555 so the code relocation can be reviewed independently of new coverage.

Stack 1/2: this PR targets main. The additional coverage is in #7924, based on this branch. Review and merge this PR first.

Changes

Move the existing Test_Otel_Metrics_Configuration_Temporality_Preference class into tests/parametric/otel_env_vars/test_otel_exporter_otlp_metrics_temporality_preference.py. Preserve its name, feature/scenario decorators, environment settings, three parameter cases (unset, DELTA, CUMULATIVE), and complete assertion body.

Extract the existing metric constants and helper functions into the existing tests/parametric/otel_env_vars/utils.py, and import them from both test files. Helper annotations are updated to satisfy linting outside a test_*.py module; their runtime logic is unchanged. All existing constants are retained. Using utils.py follows the test-helper naming convention enforced by TEST_THE_TEST.

Relocate the class/method manifest entries and copy the inherited file-level declarations to the new path, preserving effective support and skip conditions. Feature attribution and expanded support declarations belong to the second PR.

Validation

• ./run.sh TEST_THE_TEST tests/test_the_test/test_conventions.py: passed with the helpers in otel_env_vars/utils.py.
• Structural comparison confirms all original metric test classes, helper runtime bodies, and constant values are preserved.
• Compared effective declarations for the moved test across every manifest: unchanged.
• Node.js 7.0.0-pre: all three relocated cases passed with --skip-parametric-build.
• ./format.sh: passed, including mypy, import policy, Ruff, YAML/manifest validation, shellcheck, and Node.js linters. An unrelated empty, untracked utils/build/docker/internal_server/app.sh directory was temporarily moved for shellcheck and restored afterward.

[github-actions]

CODEOWNERS have been resolved as:

tests/parametric/otel_env_vars/test_otel_exporter_otlp_metrics_temporality_preference.py  @DataDog/system-tests-reviewers
manifests/cpp.yml                                                       @DataDog/system-tests-reviewers
manifests/dotnet.yml                                                    @DataDog/system-tests-reviewers
manifests/java.yml                                                      @DataDog/system-tests-reviewers
manifests/nodejs.yml                                                    @DataDog/system-tests-reviewers
manifests/php.yml                                                       @DataDog/system-tests-reviewers
manifests/python.yml                                                    @DataDog/system-tests-reviewers
manifests/ruby.yml                                                      @DataDog/system-tests-reviewers
manifests/rust.yml                                                      @DataDog/system-tests-reviewers
tests/parametric/otel_env_vars/utils.py                                 @DataDog/system-tests-reviewers
tests/parametric/test_otel_metrics.py                                   @DataDog/system-tests-reviewers

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-02T14:12:48.252455Z	b9f1250	Draft marked ready

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